I know about maths mate.
I tend to get about 40mpg out of my petrol 1.6 FSI. Which is decent enough.
When I was looking for the last car a lot of the diesels were ex company cars with high miles, and I wanted a lower mileage example. Diesel models also seemed to be more expensive.
I admit to not knowing so much about diesels, so I'm geniunely interested in an answer, is there truth in the idea that diesels only get maximum fuel efficency on a long run? So a 3-4 mile trip won't be very efficient.
(I'm waiting for DH to point out that petrol engines are the same

)
I would probably consider a TDI, if I could get over a hang up that they're noisy, smelly and give off fumes that are worse for humans than petrol fumes (too much Daily Mail I think).
Someone want to lend me a TDI and prove me wrong?